Jarring-machine.



No. 891,488. PATBNTBD JUNE 23, 1908.

'f W. LEWIS.

JARRING MACHINE.

APPLICATION FILED JULY 25.1906.

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N, I @mv E L No. 891,488. PATENTED JUNE 23, 1908, W. LEWIS.

JARRING MAGHNB.

APPLICATION FILED JULY 25.1906.

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:ws/role v A Wl TNESSES JARRING MACHINE.

APPLICATION FILED JULY 25. 1906.

3 SHEETS-SHEET 3 LM r 1 E uwsssss.- 1; INVENTW? www4 Q Z 0 m UNITEDsra-TES PATENT ourlet..

WILFRED` LEWIS, OF.PIIILADELPHIA, PENNSYLVANIA, ASSIGNOR TO 'IABORMANUFACTUR- ING COMPANY, 'OF CAMDEN, NEW JERSEY, A CORPORATION OF NEWJERSEY.

J ARRING-MACHIN E.

Specification of Letters Patent.

Patented June 23, 1908.

' Application led July 25, 1906, Serial No. 327,631.

tain new and useful Improvement in Jarring- Machines, of which thefollowing is a true and exact description, reference being had to the'accompanying drawings, which form a part` thereof.

My invention relates to molding machines ofthe type known as jarrinrmachines.

and has for its object to genera ly improve the strength and sim licityof such machines and also to provide, lioth for their more efficientautomatic action and for their properly guided and controlled action inthe drawing of the pattern. The nature of my improvements will be bestunderstood as des lribed in connection with the drawings in which theyare illustrated and in which Figure 1,is a perspective elevation of,machine provided with my improvements. Fig. 2, being an elevation ofthe cylinder and piston of my machine with the cylinder and jarringtable shown in section'and the valve actuating mechanism illustrated inconnecl tion therewith. Fig. 3, is a plan view on the section line 3-3,of Fig. 4, and Fig.`4, is an elevation on the line 4---4, of Fig. -l,the

mechanism being shown in Figs. i), and 4- on aVA larger scale than inFigs. 1 and 2. Fig. 5, is :i plan view on the section line 5--5, of'Fig. l, of a somewhat modified construction. f Fig. 6, is an elevationon the section line (if-.(5, olI Fig. 5, and Fig. 7, is' a longitudinalcentral sectional view of the valve construction shown in Figs. 5 and 6.Fig. X is a section on the line 8 8 of Fig. 4.

A, is the base of the machine which supportsthe pedestal A', having theanvil face A5, from the center of which pedestal extends upward thefixed plunger -piston A2; the lower part of the pedestal/i', is providedwith a transverse opening, indicated at A3, and a port A, extends inlaterally through the upper end of the pedestal and tllrough the pistonto the head thereof.

B ,is a movable cylinder fitting on the stationary piston A2, andsupporting and, preferably, formed integral with the jarring table B,the outwardly extending flanges ofwhich are pressed and stiffened by thesupporting ribs or buttresses indicated at B2, B2, ete. y

B3, is a perforated and internally threaded lug extending out from thelower end of the cylinder B, the lower end B4, of which contacts withthe anvil A5. By preference the anvil Af has its cylindrical engagingsurface faced by the washer W for the purpose hereinafter described Thestationary piston and movable table supporting cylinder forms oneimportant feature oflmy invention, 4this construction materially aidingin the stiffness and strength of the structure and also being animportant l feature in the valve actuating combinatiolr of mechanism tobe described.

C, is a valve casing shown in two different modifications, one in Fig. 4and the other in Figs. (i and 7, both, however, are characterized byhaving a cylindrical valve chamber which connnunicates tl'irough a portC', with the port A, leading to the top of the stationary piston througha port C2, with a pres* sure fluid supply pipe Q, and a port C3, whichcominLmicateswith an exhaust conduit, such as lt. The 'cylindricalchamber has at each end the terminal chambers C5, C. The chamber C, inthe construction of Fig. 4, communicating with the exhaust pipe lt,through a conduit S, while, inthe construction of Figs.. 6 and 7,corresponding cham ber (1, is closed. y

l), see Figs. and 7, is a piston valve working in the easing C, andformed with an annular port D', communicating through an infernal portor passage D,- with the head of the piston valve and through it with theehan'iber (`f"; a vertical interior port or passage D, communicates withthel chamber C, and ywith the lateral port D4, which is so 4placed as toregister with the exhaust port C, when the port D', connects theadmission 'port C, with the port C', as shown in 7. A lateral port D,also connects with the port D, and is so located that when the valve 'ismoved upward it will communicate with the port (I2. It will be observedthat, in the position shown' in Figs. 6 and 7, the port C, is connectedwith the inlet port C2, admitting the pressure fluid to the eyhnder andalso throu h the port D, to the chamber C5, so that t e pressure of theair or steam rests -upon the head of the piston valvel D( When the valveis raisedfthrough its valve rod E, the port D', is out off from theadmission port. C?, and immediately thereafter connects the I port; C,with the-exhaust'port C3, the chamberCf pressure being, of course,simultaneouslyl connected with the exhaust port. The upward movement ofthe piston valve also disconnects the orts D, and'D3, with the exhaustport and immediately thereafter the lateral port D5, connects with the,supplyport C2, admittin the pressure fluid to the chamber C2'. It w'thus be seen that immediately on the valve being raised to anintermediate 'osition by means acting through the stem iil, pressurefluid is admitted below it to complete its upward movement,l by `a quickand rapid action It will also be seen that when the valve is in elevatedposition'its downward movement, through action' on its stem E, willreverse the conditions described, connecting the chamber C", .with theexhaust. and the cham\ ber C5, with the pressure fluid port, so that,

after passing the'intermediate position, the.

further downward movement of the valve will become rapid under theinfluence f the/ Huid. f

In the modified construction of valve shown in Fig. 4', the lowersectionyof the cylindrical valve chamber, indicated at C', is of asmaller diameter than the upper sections and the iston'valve is'properly formed to fit in both the broader and narrower. sections asshown. The valve is indicated at H, andhas an upper cylindrical sectionH', with one or more vertical ports H3, formed through it connectingwith the-chamber C5, an annular flan e H2, being formed on the lowersection of t e-y valve, as shown. In the position shown in Fig. l4 thesupply port C2, is in free communicatlon with the ort A, and with thechamber C5, and it wil be seen that an upward movement of the valvewill, simultaneously with the connection of the ports A4, and exhaustport C3, Vclose the admission port C2, and connect the chamber C5, withthe exhaust, 'while the pressure fluid, acting on the 'annular sectionH2, will press the valve upward to its higher position. It will be seenalsothat, in the downward motionof the valve, .the pressure fluid willbe admitted to the chamber C5, simultaneously with the opening of theports C2, and A, resulting in the utilizationof the pressure fluid ltocomplete the downward motion of the valve. So far as the action of thevalve is concerned inv this construction, the che mber C, might beabsent or open tothe atmosphere. I employ it, however, by preference,and connect it by the pipe S,`with the exhaust c onduit R, which isnormally, of course, at atmospheric pressure, but which, for -purposesto be described, I provide withv a stop cock R', by which it can beentirely closed and, in connection with this modification, I employ aseparate pressure fluid admission pipe Q2, leading directly to the portA4, and provided with a three-way cock Q3, Fig. 8, Vhen it is desired touse the cylinder and piston for the work of drawing the pattern, I closethe cock R, in the exhaust pipe and the cock Q2, in the port A4, throu hthe pipe Q2. vThe upward movement of t e cylinder, through mechanism tobe described, will draw the piston valve-upward, connecting .the ort A4,with the exhaust, but the exhaust eing closed, the pressure fiuid cannot escape, but will pass through the pipe S, into the chamber C", withvalve insures. that the valve actuating lever shall not getfin'to thewa'y of the actuating precaution were not taken.

As already stated the initial movements of the piston valves D or H isimparted to them through the valve stems indicated at E. In theconstruction of Fig. 4, a cap I, is secured at the top of the valve stemE, and provided which it is connected to the lever larm J of 'abell'crak lever pivoted at J2, and provided with the second lever armindicated at J. The construction indicated in Fig.l 6 is much the sameexcept in detail; the connection of the spindle E with the bell cranklever being made in this construction through a trun- .nion' sleeve F,held normally inits lowermost position by the action of a .spring E3,which as shown is coiled around a sleeved collar E',

which rests on the sleeve F, the upper end of the spring resting againstan abutment plate E2, In this construction a certain elasticity is'provided for in the upward movement of the valve.

In both lmodifications the bell J, J', ,and through it, the pistonvalves, are

actuatedy by adjustable blocks K', K2, at-

.tached to the vertically movable cylinder B, and, preferably, as shown,through a` threadthe table B', while its lower end is secui'ed in thelug B3, the blocks K',vand K2, screwing on this rod, as indicated. Itwill be seen that in the upward Vmovement of the table lever arm J,pushing it upward and outward and raising the piston valve to such anextent as to bring the air pressure into play to complete its upwardmovement, so also it downward and moving the piston' valve through theinitial part of its downward motion.

It will be seen that the valve mechanism here shown and describedinsures full port openings during the rise and fall of the jars ringhead and reduces to a-minin1um the cushioning effect of back pressurewhen the headstrikesits abutment in falling. At the supply pipe andadmit pressure fluid to the the result of keeping a constant pressureonY the lower end of the piston valve and holdingL in its uppermostposition, a function of some importance, inl that this position: of the'mechanism, which mightfbe the case if this with'. laterally extendingtrunnions I', by

crank lever the block K2, will come in contact with the will be seenthat during the downward movement of the piston the block K', will comeincontact with the lever arm J', pushing it y ed rod K, the upper end ofwhich is held by v the softer rings in place.

instant of contact the port C2, may just begin [rangement the metal ofthe movable member to open and practically the full effect of the fallcan be realized on the sand, but as the valve continues to open, thehead rises at full speed with a full port opening until admission is cutofi' and the head again drops with l a full exhaust. In jar ramiiiing,the work done upon the sand depends first upon the arrested velocity andsecond upon the inten- The greater the fall the greater the work done,and the harder ing 'the alinement and in reducing the insity of the blowstruck.

the materials coming in contact the greater the intensity of the shock.to settle the sand rapidly but not always advisable to ram it very hard,and to obtain quick'action with limited intensity of effect,

I introduce between the anvil face A5, and

the cylinder end 134, the fiber washer w, which is preferably built upof alternate rings of vlea-ther, rawhide, or the like and steel, theleather or rawhide being used to deaden the blow and the steelsimply tol'iold y The intensity of the shock naturally varies directly with thefall and inversely with the thickness of fiber interposed between theanvil and the jarring head. Metallic contact is thus avoided and theblow softened to any desired extent.

The remaining portions of the apparatus shown in Fig. 1A of the drawingsembody some features of novelty which are claimed in my copendingapplication filed `December l, 1906 Serial Number 345,947 they form* noessential parts of my present. invention. lt will be enough therefore tovery briefly refer to these parts of the machine; A1, a pedestal with. atransverse openingindicated at A, through which opening passes the rockshaft L, liaving-a laterally extending pin L2, which.

extends through a slot in the side ofthe pedestal A1, and to which isattached spring Ij, tending to draw the pedestal into the position inwhich the cylinders L', L, secured to the two ends of the rock shaft L,are vertical; stops as indicated at L, L', preventing the'cylin; dersfrom moving beyond this vertical position under the inliuenceof thespring. lf,

L5, indicate compressed air conduits leading to the pistons L, L, and M,ML indicate plunger pistons working in the side cyl1nders, the properalineinent of the cylinders and plunger pistons being provided for asshown by the rock shaft N having the lever arms N', N2, connecting witha rod N3, to the ends of which are pivotally connected the .rods N4, N4,the upper ends of which are pivotally connected to the upper ends oftheplunger pistons M, M, the device constituting a parallel motion of afamiliar kind. O, indicates the pattern plate secured to the top of the`plunger pistons .M, M, P, indicating the pattern and T, the mold box.

I reg'ard thev arrangement shown in which the movable jar table iscarried by the cylin- .lerfas highly advantageous. By this arlt isimportant l is distributed inthe most advantageous manner to resist thesevere stresses acting on it in operation. effect a deep and stiff-beamin which all of The table and cylinder forni inl the parts of thestriking structure are put under compression and not under tension atthe instant of engaging the anvil. Furthermore, the extended bearingsurface obtained by arranging to have the end of the cylinder inipingeagainst the anvil assists in preserv- ,iurious'wear occurring inoperation.

Having now described my invention, what l claim as new and desire tosecure by Letters Patent is 1. ln a iarring machine, a fixed verticalpiston having a poit extending through it to its top in combination witha movable cylin i der fitting on said piston and supporting a moldtable, and an anvil against which the lower end of the movable cylinderimpinges. 2. In a jarring machine, a fixed vertical piston having a portextending through it to its top in combination with a movable cylinderfitting on said piston and supporting' a mold table at its top, saidcylinder having lateral flanges extending from its sides to support thelateral extensions of the table, and an anvil against which the lowerend of the movable cylinder impinges.

ln a jarring machine, meansfor actuating a mold table consisting of acylinder and piston in combination with a valve chamber having ports.connected to a source of fluid pressure, to exhaust and to the cylinder,a piston valve movingA in said chamber, the ports of the chamber andvalve being arranged so that on being moved into an intermediateposition to close the cylinder port either to pressure or exhaust, thepressure acts upon the valve to complete its movement and thus connectthe cylinder vport to exhaust orpressure, and means for moving the valvefrom either limit of its movement into its intermediate position.

4. In a jarring machine, means for actuating a mold table consisting cfacylinder and piston in combination with a' valve chamber,

having ports connected to a source of fluid.

pressure, to exhaust and to the cylinder, a

and thus connect the cylinder port to exhaust or pressure, and meansactuated by the movement of the part which moves the inold table formoving the valve from either limit of its movement into its intermediateposition. l y

5. In a jarring machine, a fixed vertical piston having a port extendingthrough it to Eistm,

its top in combination with a movable cylinder fitting on said iston andsupporting a mold table, a valve c amber, having ports connected to asource of fluid pressure, to exhaust and to the cylinder, a plston valvemoving in said chamber, the ports -of the chamber and valve beingarranged so that on being moved,

6. In a Jarring machine, means for actuating a mold table consistin of acylinder4 and in combination Wii a valve chamber avinglports connectedto a source of fluid pressure, toI exhaust, and to the cylinder,

said chamber having also chambers at top and bottom, a piston valvemoving in said chamber, the ports of the cylinder, and valve beingarranged' so that the pressurev fluid acts to move the valve over thelater stages oflits travel in veither direction, a cock forcloslng theexhaust, an open conduit connecting the exhaust With the end chamber inthe valve chamber, a conduit for admitting pressurefluid to the cylinderWithout passing through the valve, and means actuated by the movementsof the part Which moves the table and acting to move the valve to andover its intermediate positions.

WILFRED LEWIS. Witnesses:

,ARNOLD KATZ, D. STEWART.'

